GBTG vs HSTM: Correlation
Global Business Travel Group, Inc. (GBTG) and HealthStream, Inc. (HSTM) show a moderate relationship: their 3-year correlation of weekly returns is 0.49.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are GBTG and HSTM?
Over the past 3 years, GBTG and HSTM moved with a correlation of 0.49, which is moderate. Little has changed lately, as the 1-year reading of 0.59 lands near the 3-year figure. Over 5 years the correlation is 0.36, and the annualized covariance of weekly returns is 680.4 %².
Among the 27 assets we track against GBTG, HSTM ranks #10 by 3-year correlation. The trailing year gives GBTG the advantage: +14.8% versus +2.2%, a 12.6-point spread. Note the risk asymmetry: GBTG runs 1.8 times the annualized volatility of the other leg, so equal-weighting the two is not an equal-risk position.
How is this computed?
Pearson correlation on weekly returns: ρ(A,B) = cov(rA, rB) / (σA · σB), over windows of 52, 156 and 260 weeks. Covariance is annualized (×52) and expressed in %². Full definitions on the methodology page.
GBTG vs HSTM: side by side
| GBTG (Global Business Travel Group, Inc.) | HSTM (HealthStream, Inc.) | |
|---|---|---|
| 1-year return | +14.8% | +2.2% |
| 5-year return | n/a | -1.6% |
| Volatility (ann.) | 50.5% | 27.4% |
| Beta vs S&P 500 | 1.39 | 0.54 |
| Max drawdown (3Y) | -48.0% | -41.4% |
| Market cap | $4.9B | $0.8B |
| P/E (trailing) | 59.1 | 40.0 |
| Dividend yield | 0.00% | 0.46% |
| Sector / category | US Listed | US Listed |
Year-by-year returns
| Year | GBTG | HSTM |
|---|---|---|
| 2022 | – | -5.8% |
| 2023 | -4.4% | +9.3% |
| 2024 | +43.9% | +18.1% |
| 2025 | -17.6% | -27.1% |
| 2026 | +23.7% | +25.5% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are GBTG and HSTM good diversifiers for each other?
A fair diversifier. At 0.49, enough of each asset's movement is its own that the pair has smoothed outcomes historically.
FAQ
What is the correlation between GBTG and HSTM?
As of 2026-08-27, the correlation of weekly returns between GBTG and HSTM is 0.49 over 3 years, 0.59 over 1 year and 0.36 over 5 years.
Is HSTM a good diversifier for GBTG?
A fair diversifier. At 0.49, enough of each asset's movement is its own that the pair has smoothed outcomes historically.
What does a correlation of 0.49 mean?
Correlation ranges from −1 to +1. Values near +1 mean two assets move together, near 0 that they move independently, and negative values that they tend to move in opposite directions. It measures co-movement, not performance.
Use this data
$ curl https://www.pairbook.io/api/v1/pairs/gbtg-vs-hstm.json
Drop this badge in a README or notebook; it updates with the data:
[](https://www.pairbook.io/pair/gbtg-vs-hstm/)
No key needed, free to use. Full endpoint list in the API documentation.
Related comparisons
Hubs: GBTG correlations · HSTM correlations
